JP7052125B1 - Vent cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To direct an air flow blown from a vent cap to a front away from a wall surface of a building. SOLUTION: For a vent cap 1 having a base 10 having an insertion cylinder 12 inserted into a ventilation port formed on a wall surface of a building and a cover 20 to be assembled to the base 10, the cover 20 is in front of the insertion cylinder 12. A front surface portion 21 covering the base 10 and a side surface portion 22 are provided between the base 10 and the front surface portion 21, and the side surface portion 22 is the axial center of the insertion cylinder 12 from the side of the base 10 toward the side of the front surface portion 21. The side surface inclined portion 26 has a side surface inclined portion 26 that inclines in the direction approaching the A crosspiece 28 extending in the direction is provided, and the crosspiece 28 has a rectifying blade piece 29 extending toward the insertion cylinder 12, and the rectifying blade piece 29 blows an air flow from the insertion cylinder 12 into the cover 20. , It is rectified so as to blow out to the front side of the front surface portion 21. [Selection diagram] Fig. 1

Description

The disclosure in this application relates to vent caps, in particular to vent caps attached to ventilation openings provided on the walls of buildings.

The walls of a typical building are formed with through holes that penetrate inside and outside to exchange air inside and outside. A vent cap is attached to the ventilation port, which is the open end of the through hole, to prevent foreign matter such as wind and rain from entering (see Patent Document 1 as an example).

Japanese Patent No. 4549641, paragraph 0009-0017, FIG. 1-FIG. 4

By the way, when the exhaust flow of oil smoke, steam, etc. blown out from the vent cap is blown onto the wall surface, eaves, etc. of the building, the oil, moisture, dust, dust, etc. contained in the exhaust flow adheres to the wall surface, etc. and becomes dirty. It may end up. Therefore, there is a type of vent cap that controls the blowing direction so that the wind blown from the vent cap does not hit the wall surface or the like. On the other hand, the vent cap has ventilation performance that reduces the pressure loss of the wind blown from the vent cap, and is wind resistant to ensure ventilation performance by suppressing the blowing of outside wind into the vent cap even during strong winds. There are many required functions such as performance. However, it is not easy to control the direction of the wind blown from the vent cap while satisfying these functions.

Therefore, the purpose of this application is to direct the airflow blown from the vent cap toward the front away from the wall surface of the building.

One aspect of the present disclosure that achieves the above object can be configured as a vent cap as described below.

That is, one aspect of the present disclosure is a vent cap including a base having an insertion tube inserted into a ventilation port formed on a wall surface of a building and a cover to be attached to the base, wherein the cover is the insertion tube of the insertion tube. It has a front surface portion that covers the front portion and a side surface portion between the base and the front surface portion, and the side surface portion is located at the axis of the insertion cylinder from the side of the base to the side of the front surface portion. It has a side surface inclined portion that inclines in an approaching direction, and the side surface inclined portion is formed with a side surface opening that blows out an air flow from the insertion cylinder, and the side surface opening portion extends in the vertical direction. The crosspiece has a rectifying blade piece extending toward the insertion cylinder, and the rectifying blade piece blows the airflow blown from the insertion cylinder into the cover to the front portion thereof. It is characterized in that it is rectified so as to blow out to the front side of the.

According to one aspect of the present disclosure, the vent cap has a rectifying wing piece that extends toward the insertion tube so that the rectifying wing piece allows the airflow from the insertion tube through the side opening to follow the rectifying wing piece. Can be rectified to. Therefore, the direction of the airflow blown out from the side opening can be directed forward. Further, according to one aspect of the present disclosure, since the vent cap has a crosspiece at the side opening, the crosspiece allows the airflow blown out from the side opening to be throttled and easily along the straightening blade piece and the crosspiece. can. Therefore, the direction of the airflow blown out from the side opening can be directed further forward. Further, according to one aspect of the present disclosure, since the vent cap has a side inclined portion in which a side opening is formed, the air flow from the insertion cylinder is orthogonal to the axial direction of the insertion cylinder by the side inclination portion. It can pass through the side openings evenly in the direction. Therefore, the ventilation performance of the vent cap can be improved, and the direction of the airflow blown from the side opening can be directed further forward.

One aspect of the present disclosure can be configured such that the rectifying blade piece has an inclination angle of 45 ° or less with respect to the axial direction of the insertion tube.

According to one aspect of the present disclosure, the straightening blade piece has an inclination angle of 45 ° or less with respect to the axial direction of the insertion cylinder, so that the straightening blade piece arranged at an appropriate inclination angle allows the insertion cylinder to be tilted. The direction of the airflow can be changed without damming the airflow. Therefore, the direction of the airflow blown out from the side opening can be effectively directed forward.

In one aspect of the present disclosure, the front surface portion is provided with a rectifying front ventilation portion that blows the airflow in front of the front surface portion, and the rectifying front ventilation portion is a region adjacent to the side surface opening portion. The airflow blown out from the side can be configured to attract the airflow blown out from the side opening and guide the airflow to the front side of the front surface portion.

According to one aspect of the present disclosure, a front ventilation portion for rectification is provided adjacent to a side opening on the front surface portion. Therefore, the front airflow portion for rectification allows the airflow from the insertion tube to pass through, and the airflow after the passage allows the airflow from the side opening to be attracted and guided to be blown forward. Therefore, the ventilation performance of the vent cap can be further improved, and the direction of the airflow blown from the side opening can be directed further forward.

One aspect of the present disclosure can be configured such that the rectifying front ventilation portion is provided at a position less than 30% from the left and right end portions of the front surface portion with respect to the total width of the front surface portion in the left-right direction.

According to one aspect of the present disclosure, the rectifying front ventilation portion is located less than 30% from the left and right end portions of the front portion with respect to the total width of the front portion in the left-right direction. It is possible to reliably attract the airflow from the opening and guide it to be effectively blown forward. Therefore, the direction of the airflow blown out from the side opening can be effectively directed forward.

One aspect of the present disclosure can be configured such that the front surface portion has an inclined surface that receives the air flow from the insertion tube to the side surface opening.

According to one aspect of the present disclosure, since the front surface portion has an inclined surface that receives the airflow from the insertion tube to the side opening, the ventilation performance of the vent cap can be further improved by the rectifying action of the inclined surface.

One aspect of the present disclosure can be configured such that the inclined surface has an inclination angle of 15 ° or less with respect to an axially orthogonal direction of the insertion cylinder.

According to one aspect of the present disclosure, the inclined surface of the front surface portion has an inclination angle of 15 ° or less with respect to the direction orthogonal to the axial direction of the insertion cylinder. Can be rectified to. Therefore, the ventilation performance of the vent cap can be further improved.

One aspect of the present disclosure can be configured such that the side surface opening is formed in contact with the end of the side surface inclined portion on the side surface of the wall surface.

According to one aspect of the present disclosure, the side opening is formed in contact with the side edge of the side slope on the wall surface side. Therefore, the side opening formed at the end where the side inclined portion bends in the side portion allows the airflow to be blown from the insertion cylinder into the region near the left and right ends of the side portion to be quickly blown out of the cover. Then, the amount of airflow blown out from the side opening (rear side) on the wall surface side on the upstream side of the airflow can be increased, and as a result, the retention of airflow can be suppressed on the front side of the side opening. .. Therefore, the ventilation performance of the vent cap can be further improved.

One aspect of the present disclosure can be configured such that the side surface portion has a wall surface side closing portion that closes the side surface portion on the wall surface side.

According to one aspect of the present disclosure, since the side surface portion has a wall surface side obstruction portion that closes the side surface portion on the wall surface side of the building, it is possible to suppress the air flow from being blown out from the vicinity of the wall surface by the wall surface side obstruction portion. Can be done.

In one aspect of the present disclosure, the side surface portion has an upper obstruction portion that closes the upper portion of the side surface portion, and the base can be configured to have a bell mouth whose opening area gradually increases toward the front. ..

According to one aspect of the present disclosure, the side surface portion has an upper obstruction portion that closes the upper portion of the side surface portion. Therefore, it is possible to prevent the airflow from the insertion cylinder from being blown out to the upper side (ceiling of the building) by the upper closed portion. Further, according to one aspect of the present disclosure, the base has a bell mouth whose opening area gradually increases toward the front. Therefore, the bell mouth can gradually diffuse the airflow from the insertion cylinder outward in the radial direction of the insertion cylinder. At that time, since the distance between the bell mouth formed toward the front of the base and the side opening can be shortened, the airflow blown from the bell mouth can be quickly blown out from the side opening. The retention of airflow can be suppressed at the upper blockage. Therefore, it is possible to improve the ventilation performance of the vent cap and suppress the air flow from being blown out to the ceiling side of the building.

One aspect of the present disclosure can be configured such that the side opening is located on an extension to the front of the insertion tube.

According to one aspect of the present disclosure, the side opening is located on an extension to the front of the insertion tube. Here, a comparison is made between a vent cap having the same shape of the side surface portion and a side surface opening located on the extension line to the front of the insertion tube and one not located. At this time, if the side opening is located on the extension line to the front of the insertion cylinder, due to this positional relationship, the insertion cylinder and the insertion cylinder are particularly in the direction orthogonal to the axial direction of the insertion cylinder, as compared with the other ones. The distance from the side opening can be shortened. Therefore, it is possible to increase the amount of airflow blown out from the side opening on the side of the wall surface (rear) on the upstream side of the airflow, and as a result, the airflow stays on the front side of the side opening on the downstream side of the airflow. Can be suppressed. Therefore, the ventilation performance of the vent cap can be further improved.

According to one aspect of the present disclosure, the direction of the airflow blown from the vent cap can be directed further forward.

FIG. 3 is an external perspective view including a front surface, a right side surface, and a top surface of the vent cap according to the first embodiment. FIG. 2 is a sectional view taken along line II-II of FIG. It is explanatory drawing which shows the simulation result of the airflow by the comparative example of the vent cap of FIG. 1 from the plan view. It is explanatory drawing which shows the simulation result of the airflow by the vent cap of FIG. 1 from a plan view. 2 is an external perspective view including a front surface, a right side surface, and a top surface of the vent cap according to the second embodiment. It is explanatory drawing which shows the simulation result of the airflow by the vent cap of FIG. 5 from the plan view. It is explanatory drawing which shows the simulation result of the airflow velocity distribution by the comparative example of the vent cap of FIG. 5 from the plan view. It is explanatory drawing which shows the simulation result of the airflow velocity distribution by the vent cap of FIG. 5 from a plan view. It is an external perspective view including the front surface, the right side surface, and the top surface of the vent cap according to the third embodiment. It is a front view of the vent cap of FIG. It is explanatory drawing which shows the simulation result of the airflow by the vent cap of FIG. 5 from the side view. It is explanatory drawing which shows the simulation result of the airflow by the vent cap of FIG. 9 from the side view. FIG. 3 is an external perspective view including a front surface, a right side surface, and a bottom surface of the vent cap according to the fourth embodiment. It is a front view of the vent cap of FIG. FIG. 14 is a cross-sectional view taken along the line XV-XV of FIG. It is a photographic view which shows the air flow when the vent cap of FIG. 13 is used from the bottom view. It is a photographic view which shows the air flow when the vent cap of FIG. 13 is used from the side view.

Hereinafter, preferred embodiments disclosed in the present application will be described in detail with reference to the drawings. It should be noted that the present embodiment described below does not unreasonably limit the content of the present invention described in the claims, and all the configurations described in the present embodiment are indispensable as the means for solving the present invention. It is not always the case.

The same reference numerals are given to the configurations common to the following embodiments, and duplicate description in the specification is omitted. Further, duplicate description will be omitted for the usage method and the action and effect common to each embodiment. Here, in the present specification and the scope of claims, when the term "first", "second", "third" and "fourth" are used, they are used to distinguish different components. It is not used to indicate a specific order or superiority or inferiority. In the scope of the present specification and claims, for convenience, as shown in FIG. The direction is described as the Y direction, and the height direction is described as the Z direction.

1st Embodiment [Fig. 1-Fig. 4]

Hereinafter, the vent cap 1 as the first embodiment of the present application will be described with reference to the drawings. Here, an example in which the vent cap 1 is attached outdoors is described. In the Y direction, the front side (front side of the vent cap 1, upper side in FIG. 2) is the outdoor side, and the rear side (rear side of the vent cap 1) is the outdoor side. It will be described as the internal space (indoor) side of the building. However, these descriptions do not limit the usage method, mounting location, etc. of the vent cap 1.

Vent cap 1

The vent cap 1 is a facility attached to a ventilation port or the like formed on a wall surface W (see FIG. 3 or the like) of a building to prevent wind from blowing in, rainwater from entering, insects from entering, and the like. The vent cap 1 includes a base 10 and a cover 20 as shown in FIGS. 1 and 2.

The base 10 and the cover 20 are made of a metal material. In particular, since the vent cap 1 is installed outdoors, a stainless steel material having excellent corrosion resistance and acid resistance in the atmosphere and excellent workability, for example, SUS304, is used for the base 10 and the cover 20. However, when the vent cap 1 of the present embodiment is applied to a place where strong durability is not required without being exposed to wind and rain, for example, the vent cap 1 is not limited to a metal material but is made of a resin molded body or the like. Can be done.

The base 10 is a portion for attaching the vent cap 1 to the ventilation port and supporting the cover 20. The base 10 is located on the rear end side of the vent cap 1 in the Y direction. As shown in FIG. 2, the base 10 has a back plate 11 and an insertion tube 12.

The back plate 11 is a portion arranged along the wall surface W when the vent cap 1 is attached to the ventilation port. The back plate 11 has a flat plate shape having a rectangular plate surface along the XZ plane.

The insertion tube 12 is a portion to be inserted into the ventilation port from the rear end side in the Y direction. The insertion cylinder 12 is connected to the plate surface on the back side of the back plate 11. The insertion cylinder 12 has an annular shape when viewed from the front of the vent cap 1, and has a hollow cylindrical shape extending from the central portion of the plate surface of the back plate 11 toward the rear in the Y direction. That is, the axial direction of the insertion cylinder 12, in other words, the cylinder axial direction coincides with the Y direction. The outer diameter and inner diameter of the insertion cylinder 12 are constant regardless of the position of the insertion cylinder 12 in the Y direction. The back plate 11 is provided with an opening that penetrates the central portion of the plate surface in the Y direction according to the inner diameter of the insertion cylinder 12. As a result, the base 10 penetrates in the Y direction in the radial inner region of the insertion cylinder 12.

The cover 20 is a portion that covers the opening of the base 10. The cover 20 is assembled to the base 10 on the front end side of the vent cap 1 in the Y direction. The cover 20 has a box shape with an opening at the rear end in the Y direction. The cover 20 has a symmetrical shape and a vertically symmetrical shape. The cover 20 has a front surface portion 21, side surface portions 22, 22, a top surface portion 23, and a bottom surface portion 24.

The front surface portion 21 is a portion that covers the front of the insertion cylinder 12. The front surface portion 21 is located at the front end of the cover 20 in the Y direction. As shown in FIG. 1, the front surface portion 21 has a flat plate shape having a rectangular plate surface along the XZ plane. The back surface of the front surface portion 21 is arranged to face the opening of the back surface plate 11 that communicates with the insertion cylinder 12. The vent cap 1 has an outside wind resistance performance because the front surface portion 21 receives the outside wind from the front in the Y direction and suppresses the intrusion into the inside of the vent cap 1.

The side surface portion 22 is a portion where the airflow from the insertion cylinder 12 is mainly blown out. The side surface portion 22 is located between the base 10 and the front surface portion 21. The side surface portion 22 has a side surface base portion 25 and a side surface inclined portion 26. Since the cover 20 has a symmetrical shape as described above, the side surface portions 22 and 22 extend rearward along the Y direction from the left end portion and the right end portion of the front surface portion 21, respectively.

The top surface portion 23 is a portion that covers the upper portion of the cover 20. The top surface portion 23 is located at the upper end of the cover 20 in the Z direction. As shown in FIG. 1, the top surface portion 23 has a substantially isosceles trapezoidal shape along an XY plane, strictly speaking, a flat plate shape having a hexagonal plate surface. The back surface of the top surface portion 23 is arranged to face the bottom surface portion 24.

The bottom surface portion 24 is a portion that covers the lower portion of the cover 20. The bottom surface portion 24 is located at the lower end of the cover 20 in the Z direction. As shown in FIG. 2, the bottom surface portion 24 has a substantially isosceles trapezoidal shape along an XY plane, strictly speaking, a flat plate shape having a hexagonal plate surface. The vent cap 1 also has an outside wind resistance performance by receiving the outside wind blown up from below in the Z direction by the bottom surface portion 24 and suppressing the intrusion into the inside of the vent cap 1.

The side surface base 25 is a portion that is coupled to the base 10 and supports the side surface inclined portion 26. The side surface base 25 is located at the rear end of the cover 20 and the side surface 22 in the Y direction. As shown in FIG. 1, the side surface base portion 25 has a flat plate shape having a rectangular plate surface along a YZ plane. Here, if the side surface inclined portion 26 can be coupled to the base 10 and does not interfere with other portions when these are directly coupled, the vent cap 1 may be configured not to have the side surface base portion 25. However, it is preferable that the vent cap 1 has the side surface base 25 because the ventilation performance of the vent cap 1 can be further improved and the direction of the airflow blown from the side opening 27 can be directed more forward.

The side surface inclined portion 26 is a portion where the airflow from the insertion cylinder 12 is mainly blown out. The side surface inclined portion 26 is located at the front end of the side surface portion 22 in the Y direction. The side surface inclined portion 26 projects from the front end of the side surface base portion 25 in the Y direction toward the front in the Y direction. However, as shown in FIG. 2, the side surface inclined portion 26 approaches the axis of the insertion cylinder 12 in the X direction from the side of the base 10 to the side of the front portion 21, that is, toward the front in the Y direction. That is, it is inclined with respect to the axial direction of the insertion cylinder 12. As a result, the cover 20 has a tapered shape in which the front surface portion 21 side is tapered in a plan view. In the vent cap 1 exemplified in FIGS. 1 and 2, the side surface inclined portion 26 is inclined by 20 ° with respect to the Y direction. The side surface inclined portion 26 has the same plate thickness as the side surface base portion 25 and has a flat plate shape having a rectangular plate surface. A side surface opening 27 is formed in the side surface inclined portion 26.

The side opening 27 is a portion where the airflow from the insertion tube 12 is blown out. The side opening 27 occupies most of the side inclined portion 26. In the present embodiment, substantially the entire area of the side surface inclined portion 26 is used as the side surface opening 27. The side surface opening 27 is a rectangular opening that penetrates the side surface inclined portion 26 in the plate thickness direction. Therefore, the side opening 27 functions as an outlet for the airflow blown into the cover 20 from the insertion cylinder 12. Since the side surface opening 27 is provided on the side surface inclined portion 26, the opening by the side surface opening 27 faces not only the side of the cover 20 in the X direction but also the front of the cover 20 in the Y direction. Become. The side opening 27 is provided with a crosspiece 28.

The crosspiece 28 is a portion for narrowing the opening area of the side opening 27. The crosspiece 28 is bridged between the upper end and the lower end of the side opening 27 in the Z direction. The crosspiece 28 has a flat plate shape that continuously extends in the vertical direction in the Z direction from the side surface inclined portion 26 and has a rectangular plate surface. Similar to the side surface inclined portion 26, the plate surface of the crosspiece 28 is inclined toward the front in the Y direction so as to approach the axis of the insertion cylinder 12 in the X direction. In the vent cap 1 exemplified in FIGS. 1 and 2, the crosspiece 28 has a length of 4 mm in the front-rear direction. In the side opening 27, a plurality of crosspieces 28 having the same shape are arranged at equal intervals in the Y direction. In the vent cap 1 exemplified in FIGS. 1 and 2, five crosspieces 28 are formed. A rectifying blade piece 29 is provided on each of the plurality of crosspieces 28.

The crosspiece 28 can increase the velocity of the airflow blown out from the side opening 27 by narrowing the opening area of the side opening 27. This increased airflow has the effect of attracting the surrounding airflow. Further, the crosspiece 28 can be passed along the crosspiece 28 so that the airflow blown into the inside of the cover 20 from the insertion cylinder 12 is blown out from the side opening 27 instead of from the crosspiece 28. As a result, the crosspiece 28 can rectify the airflow forward from the crosspiece 28 toward the side opening 27. Therefore, the crosspiece 28 can increase the ratio of the airflow blown forward from the side opening 27 in the front direction of the vent cap 1, that is, in the Y direction.

The rectifying blade piece 29 is a portion that changes the direction of the airflow blown from the side opening 27. The rectifying blade piece 29 projects from the rear end of the crosspiece 28 in the Y direction toward the rear in the Y direction. However, the rectifying blade piece 29 is inclined toward the rear in the Y direction so as to approach the axis of the insertion cylinder 12 in the X direction. In this way, the rectifying blade piece 29 extends toward the insertion tube 12. As a result, the crosspiece 28 and the rectifying blade piece 29 have a V-shape that bends at the outer end in the X direction in the horizontal cross-sectional view of the cover 20. In the side opening 27, a plurality of rectifying blade pieces 29 having the same shape are arranged at equal intervals in the Y direction corresponding to the crosspiece 28 to form a so-called gall (blade plate). In the vent cap 1 exemplified in FIGS. 1 and 2, five rectifying blade pieces 29 (blanket blades) are formed.

The rectifying blade piece 29 can be rectified so as to blow out the airflow blown from the insertion cylinder 12 to the cover 20 toward the front in the Y direction of the front surface portion 21 by making it along its own plate surface. That is, as described above, the rectifying blade piece 29 is connected to the crosspiece 28 in a V shape on the front plate surface facing the front surface portion 21, so that the airflow can be passed in the direction of the crosspiece 28. On the other hand, since the rectifying blade piece 29 communicates with the side opening 27 on the rear plate surface facing the back plate 11, airflow can be blown out from the side opening 27 along the plate surface. Therefore, the rectifying blade piece 29 connected to the crosspiece 28 has S along the front plate surface, the crosspiece 28, and the rear plate surface, respectively, with the rectifying blade piece 29 adjacent to the front in the Y direction. The direction of the airflow can be rectified in a shape.

Here, in the front portion of the side surface portion 22 in the Y direction, the rearward airflow in the Y direction that wraps around from the front surface portion 21 reaches, so that the airflow blown out from the side surface opening 27 is unlikely to be forwardward. However, the rectifying blade piece 29 prevents the airflow wrapping around from the front surface portion 21 from being blown backward from the side opening 27 as it is, and rectifies the direction of the airflow forward by following its own plate surface. Further, the crosspiece 28 narrows the area of the side opening 27 to rectify the airflow wrapping around from the front surface 21 and bypassing the rectifying blade piece 29 in a U-shape with a larger curvature, that is, forward. Such an effect is realized by providing a crosspiece 28 having a width that appropriately narrows the side opening 27 in the front-rear direction in the Y direction so that the airflow in the vicinity of the front portion 21 is along the rectifying blade piece 29. be able to.

According to the vent cap 1 having such a configuration, the airflow from the side opening 27 can be made forward even in the front part of the side portion 22 where the airflow blown from the side opening 27 is difficult to be forward. Then, the vent cap 1 makes the airflow forward as a whole by attracting the airflow blown out from the rear side near the back plate 11 by the high-speed forward airflow blown out from the side opening 27, especially on the front side near the front surface portion 21. Can be.

There is no strict limitation on the range of the inclination angle of the rectifying blade piece 29 with respect to the axial direction of the insertion cylinder 12. However, the rectifying blade pieces 29 arranged at an appropriate tilt angle can change the direction of the airflow without blocking the airflow from the insertion tube 12 toward the front. Therefore, the direction of the airflow blown out from the side opening 27 can be effectively directed forward. When the rectifying blade piece 29 is configured to have an inclination angle of, for example, 45 ° or less with respect to the axial direction of the insertion tube 12, the above-mentioned effect can be further enhanced. When the rectifying blade piece 29 is configured to have an inclination angle of, for example, 25 ° or more and 40 ° or less with respect to the axial direction of the insertion cylinder 12, the above-mentioned effect can be further enhanced.

Here, when the side opening 27 is provided on the side surface of the insertion cylinder 12 that is not inclined with respect to the axial direction, the opening does not face forward in the Y direction of the cover 20 in the first place. In such a case, it cannot be said that the airflow blown out from the side opening 27 is forward as shown by the streamline shown in FIG. In the example shown in FIG. 3, the airflow that blows out closest to the wall is located at a position of 20 ° from the wall surface W. That is, in the example shown in FIG. 3, the left and right ends of the airflow are far below the wall surface W by 45 °, and the airflow is blown out in the direction closer to the outside in the X direction than in the front in the Y direction.

However, the side opening 27 can be provided in the side inclined portion 26 so that the opening faces forward. As a result, the airflow blown out from the side opening 27 can be made more forward. Nevertheless, by providing the crosspiece 28 and the rectifying blade piece 29 in the region of the side opening 27, the cover 20 is prevented from being greatly exposed toward the front in the Y direction. Therefore, in the vent cap 1, the outside wind resistance can be enhanced, and at the same time, the design can be enhanced. In this way, the vent cap 1 can make the airflow blown out from the side opening 27 forward, as shown in FIG. 4, while satisfying the functions of external wind resistance and design.

In the example shown in FIG. 4, the airflow that blows out closest to the wall is located at a position of 50 ° from the wall surface W. That is, in the example shown in FIG. 4, the left end and the right end of the airflow are located at positions exceeding 45 ° from the wall surface W, and the airflow is blown out in the direction closer to the front in the Y direction than the outside in the X direction, that is, forward. It can be said that there is.

Further, when the side opening 27 is provided on the side surface of the insertion cylinder 12 which is not inclined with respect to the axial direction, the airflow does not largely wrap around in the X direction in the space in the front portion of the cover 20 in the Y direction. And it is easy to stay in a state where it does not reach the side opening 27.

On the other hand, by providing the side surface opening portion 26 on the side surface inclined portion 26, it is possible to quickly blow out an air flow starting from a certain range from either the left or right end portion at the rear portion of the side surface opening portion 27. .. Therefore, it is possible to reduce the amount of airflow that stays in the front part of the side opening 27 without being blown out from the side opening 27 even though the starting point is near the left and right ends. Therefore, by providing the side surface opening portion 27 in the side surface inclined portion 26, the side surface opening portion 27 can be reached in the space in the front portion of the cover 20 without causing the air flow to wrap around in the X direction.

As a result, since the airflow does not wrap around in the X direction, the direction in which the airflow blows out from the side opening 27 can be made more forward, especially in the front portion of the side surface portion 22. At the same time, since the airflow is unlikely to stay in the space in front of the cover 20, the airflow arriving from the rear side of the cover 20 in the Y direction can be quickly blown out at the side opening 27, and the ventilation of the vent cap 1 can be ventilated. Performance can be improved.

Here, in the vent cap 1 of the present embodiment, as described above, substantially the entire area of the side surface inclined portion 26 is used as the side surface opening portion 27, so that the side surface opening portion 27 is on the side of the wall surface W of the side surface inclined portion 26. It is formed in contact with the end of the wall. Therefore, the side surface opening 27 formed at the end where the side surface inclined portion 26 is bent in the side surface portion 22 promptly blows the airflow blown from the insertion cylinder 12 to the region near the left and right ends of the side surface portion 22 to the outside of the cover 20. be able to. Then, the amount of airflow blown out from the side opening 27 (rear side) on the side of the wall surface W, which is the upstream side of the airflow, can be increased, and as a result, the retention of the airflow on the front side of the side opening 27 is suppressed. be able to. Therefore, the ventilation performance of the vent cap 1 can be further improved.

As described above, since the vent cap 1 has the rectifying blade piece 29 extending toward the insertion cylinder 12, the rectifying blade piece 29 causes the airflow passing through the side opening 27 from the insertion cylinder 12 to the rectifying blade piece 29. It can be rectified along. Therefore, the direction of the airflow blown out from the side opening 27 can be directed forward.

Further, since the vent cap 1 has the crosspiece 28 at the side opening 27, the crosspiece 28 can narrow down the airflow blown from the side opening 27 and easily follow the straightening blade piece 29 and the crosspiece 28. Therefore, the direction of the airflow blown out from the side opening 27 can be directed further forward.

Since the vent cap 1 has a side surface inclined portion 26 in which the side surface opening 27 is formed, the side surface inclined portion 26 makes the airflow from the insertion cylinder 12 evenly in the direction orthogonal to the axial direction of the insertion cylinder 12. It can pass through the side opening 27. Therefore, the ventilation performance of the vent cap 1 can be improved, and the direction of the airflow blown from the side opening 27 can be directed further forward.

2nd Embodiment [Fig. 5-Fig. 8]

Hereinafter, the vent cap 2 as the second embodiment of the present application will be described with reference to the drawings. As shown in FIG. 5, the vent cap 2 of the second embodiment is different from the first embodiment in that it is configured by the cover 40 having the front surface portion 41 instead of the cover 20 having the front surface portion 21. The vent cap 2 of the second embodiment is the same as the vent cap 1 of the first embodiment except for the above. Here, the points different from the first embodiment will be described.

The front surface portion 41 is provided with a rectifying front ventilation portion 43. The rectifying front ventilation portion 43 is a portion that blows airflow in front of the front portion 41. The rectifying front ventilation portion 43 is located in a region close to the left and right ends of the front portion 41. This position is the area adjacent to the side opening 27. The front ventilation portion 43 for rectification has a rectangular shape with rounded corners that is longer in the Z direction than the X direction of the front portion 41, and has a so-called slit shape that is an opening penetrating the plate thickness direction of the front portion 41, that is, the Y direction. ing. The rectifying front ventilation portion 43 functions as an outlet for the airflow blown into the cover 40 from the insertion cylinder 12.

In the vent cap 2, since the front ventilation portion 43 for rectification is provided on the front portion 41, the airflow blown into the inside of the cover 40 from the insertion cylinder 12 is not only the side opening 27 but also the front ventilation portion for rectification. It can be blown out from 43. Therefore, in the rectifying front ventilation portion 43, the airflow that has reached the front portion 41 can be quickly blown out, and the ventilation performance of the vent cap 2 can be improved.

Further, the rectifying front ventilation portion 43 is formed in an elongated shape as described above, and by narrowing its own opening area, the speed of the airflow blown out from the rectifying front ventilation portion 43 can be increased. This increased airflow has the effect of attracting the surrounding airflow. In the vent cap 2, since the rectifying front ventilation portion 43 is provided adjacent to the side opening 27, the airflow blown from the rectifying front ventilation portion 43 attracts the airflow blown from the side opening 27 to the front portion 41. It can be guided to blow out to the front side (see FIG. 6). Further, the airflow from the front ventilation portion 43 for rectification merges with the airflow from the side opening 27 and flows forward itself. Therefore, according to the vent cap 2, the airflow blown out from the cover 40 can be made positive as a whole.

In the example shown in FIG. 6, the airflow that blows out closest to the wall is located at a position of 56 ° from the wall surface W. That is, in the example shown in FIG. 6, the left end and the right end of the airflow are located at positions far exceeding 45 ° from the wall surface W, and the airflow blows out in the direction closer to the front in the Y direction than the outside in the X direction, that is, forward. It can be said that it is.

If the rectifying front ventilation portion 43 has a width of, for example, 5 mm in the X direction, the airflow blown from the rectifying front ventilation portion 43 attracts the airflow from the side opening 27 and blows out to the front side of the front portion 41. The effect of inducing can be fully exerted. Further, when the width of the front ventilation portion 43 for rectification is widened in the X direction and has a width of, for example, 15 mm in the X direction, the direction in which the airflow blows out from the side opening 27 can be made more forward, and the vent is also vented. The ventilation performance of the cap 2 can be improved.

However, in the vent cap 2, the narrower the width of the rectifying front ventilation portion 43 in the X direction, the higher the external wind resistance performance and the higher the design. From these facts, it is sufficient that the front ventilation portion 43 for rectification has a width of 5 mm in the X direction, so that the airflow blown from the side opening 27 is attracted and blown to the front side of the front portion 41. The effect of inducing can be fully exerted.

Here, FIG. 7 shows the direction of the airflow with an arrow and the velocity distribution of the airflow with a grayscale diagram, indicating that the darker the color, the higher the velocity. As shown in FIG. 7, when the rectifying front ventilation portion 43 is too far from the left and right ends of the front portion 41, it becomes difficult for the airflow blown from the rectifying front ventilation portion 43 to attract the airflow from the side opening portion 27. Will end up. Then, the airflow blown out from the rectifying front ventilation portion 43 does not merge with the airflow from the side surface opening 27, but flows independently toward the front. Further, if the airflow blown out from the front ventilation portion 43 for rectification does not merge with the airflow blown out from the side opening 27, it becomes difficult to attract the airflow from the side opening 27, so that the ventilation performance of the vent cap 2 deteriorates.

On the other hand, as shown in FIG. 8, the rectifying front ventilation portion 43 is at an appropriate distance from the left and right ends of the front portion 41, so that the airflow blown out from the rectifying front ventilation portion 43 is from the side opening 27. Can act to attract the airflow of. The closer the position of the front ventilation portion 43 for rectification from the left and right ends of the front portion 41 is, the more the effect of attracting the airflow blown from the side opening 27 and inducing it to blow out to the front side of the front portion 41 can be enhanced. can. At this time, the closer the position of the rectifying front ventilation portion 43 is from the left and right ends of the front portion 41, the more the airflow blown from the rectifying front ventilation portion 43 faces from the outside in the X direction to the front in the Y direction. Then, the airflow blown out from the rectifying front ventilation portion 43 toward the front in the Y direction merges with the airflow blown out from the side opening 27, so that the airflow blown out from the cover 40 can be made forward as a whole.

The rectifying front ventilation portion 43 may be provided at a position, for example, less than 30% from the left and right end portions of the front surface portion 41 with respect to the total width of the front surface portion 41 in the left-right direction. This corresponds to, for example, a position less than 51 mm from the left and right ends of the front surface portion 41 in the case of the vent cap 2 attached to the ventilation port having an inner diameter of 150 mm and having the total width of the front surface portion 41 formed to be 169 mm. As a result, the effect of inducing the airflow blown out from the rectifying front ventilation portion 43 to attract the airflow from the side surface opening 27 and blow out to the front side of the front surface portion 41 can be sufficiently exerted. The rectifying front ventilation portion 43 does not need to be separated from the left and right ends of the front portion 41, and may be provided at a position where it can be manufactured. At this time, the rectifying front ventilation portion 43 can be provided at a position, for example, 5% from the left and right ends of the front portion 41. This corresponds to a position 9 mm from the end in the case of the vent cap 2 similar to the above.

As described above, the front surface portion 41 is provided with a rectifying front ventilation portion 43 adjacent to the side surface opening portion 27. Therefore, the front ventilation portion 43 for rectification allows the airflow from the insertion tube 12 to pass through, and the airflow after the passage allows the airflow from the side opening 27 to be attracted and guided to be blown forward. Can be done. Therefore, the ventilation performance of the vent cap 2 can be further improved, and the direction of the airflow blown from the side surface opening 27 can be directed further forward.

Third Embodiment [FIGS. 9-12]

Hereinafter, the vent cap 3 as the third embodiment of the present application will be described with reference to the drawings. As shown in FIGS. 9 and 10, in the vent cap 3 of the third embodiment, the base 50, the front surface portion 61 and the side surface inclined portion 66 are different from the base 10, the front surface portion 41 and the side surface inclined portion 26 of the second embodiment. different. The vent cap 3 of the third embodiment is the same as the vent cap 2 of the second embodiment except for the above. Here, the points different from the second embodiment will be described.

As shown in FIG. 9, the vent cap 3 includes a base 50 and a cover 60. Then, as shown in FIG. 10, the base 50 has a bell mouth 51 in addition to the back plate 11 and the insertion tube 12.

The bell mouth 51 is a portion that rectifies the direction of the air flow along the inner wall surface of the bell mouth 51. The bell mouth 51 is connected to the plate surface on the front side of the back plate 11. The bell mouth 51 has a hexagonal shape when viewed from the front of the vent cap 3, and has a hollow hexagonal cylinder shape extending from the central portion of the plate surface of the back plate 11 toward the front in the Y direction. The outer and inner dimensions (opposite sides and diagonals) of the bell mouth 51 have a tapered shape that widens toward the front in the Y direction of the bell mouth 51. As a result, the bell mouth 51 has a shape in which the opening area gradually increases toward the front. In the Y direction, the bell mouth 51 extends forward to the front of the boundary between the side surface base 25 and the side surface inclined portion 66. A flange portion 52 may be formed at the front end of the bell mouth 51 in the Y direction so as to project outward in the radial direction of the bell mouth 51.

The side surface inclined portion 66 is formed on the side surface portion 62 of the cover 60. The side surface inclined portion 66 has an upper closing portion 64. The upper obstruction portion 64 is a portion that closes the upper portion of the side surface portion 62. As shown in FIG. 9 and the like, the upper closed portion 64 has a flat plate shape having a rectangular plate surface that is longer in the front-rear direction than the vertical direction of the side surface inclined portion 66. In the vent cap 3, the side surface inclined portion 66 has the upper closing portion 64, so that the upper ends of the side opening portion 67, the crosspiece 68 and the rectifying blade piece 69 are positioned downward by the length of the upper closing portion 64 in the Z direction. are doing.

The front surface portion 61 is provided with a rectifying front ventilation portion 63. The upper end of the front ventilation portion 63 for rectification is also located downward by the length of the upper closing portion 64 in the Z direction in accordance with the upper ends of the side opening 67, the crosspiece 68, and the rectifying blade piece 69.

The front end of the bell mouth 51 is arranged to be one step lower than the rear end of the side opening 67 (see also FIG. 15). With this arrangement, the airflow blown from the bell mouth 51 can be efficiently blown out from the rear end at the side opening 67. Therefore, the bell mouth 51 having such an arrangement can further improve the ventilation performance of the vent cap 3.

Further, the inclination angle of the bell mouth 51 with respect to the axial direction of the insertion tube 12 is smaller than the inclination angle of the rectifying blade piece 69 (see also FIG. 15). Due to such an angle relationship, the airflow blown from the bell mouth 51 can be effectively applied to the plate surface on the back surface side of the rectifying blade piece 69. Then, the airflow that hits the plate surface of the rectifying blade piece 69 can be efficiently blown out from the side surface opening 67. Therefore, the bell mouth 51 and the rectifying blade piece 69 having such an angle relationship can further improve the ventilation performance of the vent cap 3.

Here, as shown in FIG. 11, if the vent cap 3 does not have the bell mouth 51 and the upper closing portion 64, the airflow blown out from the cover 60 slightly spreads in the vertical direction. In the example shown in FIG. 11, the upper end and the lower end of the air flow are located at 65 ° and 62 ° from the wall surface W, respectively.

On the other hand, as shown in FIG. 12, by having the bell mouth 51 and the upper closing portion 64, the vent cap 3 can suppress the spread of the airflow blown from the cover 60 in the vertical direction, particularly in the upward direction. In the example shown in FIG. 12, the upper end and the lower end of the air flow are located at 84 ° and 80 ° from the wall surface W, respectively. In particular, the upper end of the airflow is substantially perpendicular to the wall surface W.

In the vent cap 3, since the side surface inclined portion 66 has the upper closing portion 64, the length of the side surface opening portion 67 in the vertical direction is shortened, so that the vertical spread of the airflow blown from the side surface opening portion 67 is suppressed. Can be done.

Here, in the central portion of the cover 60 in the vertical direction, a highly diffusible airflow is likely to be blown out in the vertical direction as compared with the upper portion and the lower portion thereof.

However, in the vent cap 3, the opening area of the side opening 67 is narrowed, so that the airflow that is rectified along the bottom surface 24 and has high straightness in the Z direction is blown out from the lower part of the side opening 67 at a higher speed. It will be like. As a result, the airflow diffused downward is attracted upward, and the amount of the airflow downward can be reduced. On the other hand, although a highly straight airflow is blown out from the upper part of the side opening 67 in the Z direction, the speed is higher as the lower part of the side opening 67 is affected by the airflow staying in the space above the cover 60. The air flow does not come out. As a result, the amount of the airflow that diffuses upward is attracted downward is smaller than that of the airflow that diffuses downward, but the amount of the airflow that diffuses upward can be reduced.

As described above, in the vent cap 3, since the side surface inclined portion 66 has the upper closing portion 64, it is possible to suppress the downward spread of the airflow blown out from the side surface opening 67, and at the same time, the upward spread is slightly. It can be suppressed.

As shown in FIGS. 9 and 10, the upper closing portion 64 may have a length that closes from the upper end of the cover 60 to the upper end of the inner peripheral surface of the insertion cylinder 12 in the Z direction. As a result, it is possible to suppress the vertical spread of the airflow blown out from the side opening 67, and at the same time, it is possible to suppress the deterioration of the ventilation performance due to the narrowing of the opening area of the side opening 67. When the upper closing portion 64 is configured to have a length of, for example, 15% or more and 25% or less of the cover 60 in the Z direction, the above-mentioned effect can be further enhanced. In the vent cap 3 shown in FIGS. 9 and 10, the upper obstruction portion 64 has a length of 18.3% of the cover 60 in the Z direction.

The bell mouth 51 can gradually diffuse the airflow from the insertion cylinder 12 outward in the radial direction of the insertion cylinder 12. That is, the bell mouth 51 can rectify the airflow blown from the insertion cylinder 12 into the cover 60 and suppress the retention of the airflow in the space inside the cover 60. As a result, it is possible to suppress the vertical spread of the airflow blown out from the side opening 67, and at the same time, it is possible to suppress the deterioration of the ventilation performance of the vent cap 3.

Further, since the bell mouth 51 communicates with the insertion cylinder 12 and extends forward in the Y direction of the base 50, the front end of the bell mouth 51 serves as an outlet of the flow path from the insertion cylinder 12. The distance from the side opening 67 can be shortened. Therefore, the airflow blown into the inside of the cover 60 can be quickly blown out from the side opening 67, and the occurrence of retention inside the cover 60 can be suppressed. Therefore, the ventilation performance of the vent cap 3 can be improved, and at the same time, the vertical spread of the airflow blown out from the side opening 67 can be suppressed.

As described above, in the vent cap 3, the side surface portion 62 has an upper closing portion 64 that closes the upper portion of the side surface portion 62. Therefore, in addition to being able to direct the direction of the airflow blown out from the side opening 67 further forward, the airflow from the insertion tube 12 is blown up (the ceiling of the building) by the upper closing portion 64. It can be suppressed.

Further, in the vent cap 3, the base 50 has a bell mouth 51 whose opening area gradually increases toward the front. Therefore, the bell mouth 51 can gradually diffuse the airflow from the insertion cylinder 12 outward in the radial direction of the insertion cylinder 12. At that time, the distance between the bell mouth 51 formed toward the front of the base 50 and the side opening 67 can be shortened. Therefore, the airflow blown from the bell mouth 51 can be quickly blown out from the side opening 67, whereby the retention of the airflow can be suppressed at the upper closed portion 64. Therefore, it is possible to improve the ventilation performance of the vent cap 3 and suppress the air flow from being blown out to the ceiling side of the building.

Fourth Embodiment [FIGS. 13-17]

Hereinafter, the vent cap 4 as the fourth embodiment of the present application will be described with reference to the drawings. As shown in FIGS. 13 to 15, in the vent cap 4 of the fourth embodiment, the configuration of the front surface portion 81 and the side surface inclined portion 86 and the positional relationship between the insertion cylinder 12 and the side surface inclined portion 86 are the same as those of the third embodiment. Is different. The vent cap 4 of the fourth embodiment is the same as the vent cap 3 of the third embodiment except for the above. Here, the points different from the third embodiment will be described.

The vent cap 4 includes a base 50 and a cover 80, as shown in FIGS. 13 and 15. The front surface portion 81 of the cover 80 has an inclined surface 90. The inclined surface 90 is a portion where the airflow from the insertion cylinder 12 is passed to the side opening portion 87 in the side surface portion 82 of the cover 80. The inclined surface 90 is provided at least on the back side of the front surface portion 81 constituting the inner surface side of the cover 80. The inclined surface 90 is inclined forward in the Y direction from the center of the front surface portion 81 in the X direction toward the left and right outwards. As shown in FIG. 15, the front surface portion 81 having the back surface formed by such an inclined surface 90 has a V-shape that bends with the center in the X direction as the rear end in the horizontal cross-sectional view of the cover 80. There is.

When the airflow from the insertion tube 12 hits the inclined surface 90 and advances further forward while maintaining the forward propulsive force, it advances outward in the X direction along the inclined surface 90. Then, the air flow is blown out of the cover 80 via the side opening 87 or the front ventilation portion 63 for rectification.

The inclined surface 90 can be rectified so as to be outward in the X direction of the front surface portion 81 by making the air flow blown from the insertion cylinder 12 into the cover 80 along its own plate surface. That is, as described above, the inclined surface 90 is inclined forward in the Y direction from the center in the X direction toward the left and right outwards, so that the airflow is directed toward the side opening 87 or the front ventilation portion 63 for rectification. Can be pardoned. On the other hand, since the side opening 87 or the rectifying front ventilation portion 63 is provided at the end of the inclined surface 90, the rectified and guided airflow can be quickly blown out of the cover 80. Therefore, in the vent cap 4, the inclined surface 90 can guide the air flow without staying and quickly discharge the air flow, so that the ventilation performance can be improved.

Here, the inclination of the inclined surface 90 with respect to the direction orthogonal to the axial direction of the insertion cylinder 12, that is, the X direction is defined as the inclination angle of the inclined surface 90. At this time, by having the inclined surface 90 having an inclined angle exceeding 0 °, the ventilation performance of the vent cap 4 can be improved as compared with the case where the inclined surface 90 does not have the inclined angle. Further, the inclined surface 90 has an inclination angle of more than 5 °, for example, 7 °, so that the ventilation performance of the vent cap 4 can be further improved.

On the other hand, the larger the tilt angle of the tilted surface 90, the better the ventilation performance can be, and there is no strict upper limit to the value. However, when the inclined surface 90 has an inclined angle of 15 ° or less, the cover 80 does not protrude significantly in the Y direction, and the vent cap 4 can be made smaller (thinner), which is preferable. Then, since the inclined surface 90 has an inclined angle of 15 ° or less, the air flow from the insertion cylinder 12 can be appropriately rectified by the inclined surface 90. Therefore, the ventilation performance of the vent cap 4 can be further improved.

Since the front surface portion 81 has a uniform plate thickness, a dent that sinks toward the rear in the Y direction is formed in the central portion on the front surface side of the front surface portion 81. As a result, in the vent cap 4, the design can be enhanced as compared with the configuration in which the front surface portion 81 is formed flat on one surface. However, the inclined surface 90 need only be formed on the back surface side of the front surface portion 81, and the shape of the front surface side of the front surface portion 81 is not particularly limited.

As described above, since the front surface portion 81 has an inclined surface 90 that receives the airflow from the insertion cylinder 12 to the side opening portion 87, the ventilation performance of the vent cap 4 can be further improved by the rectifying action of the inclined surface 90. can.

The side surface inclined portion 86 is formed on the side surface portion 82. The side surface inclined portion 86 has a wall surface side closing portion 91. The wall surface side closing portion 91 is a portion that closes the wall surface side of the side surface inclined portion 86, that is, the rear portion in the Y direction. As shown in FIG. 13 and the like, the wall surface side closing portion 91 has a flat plate shape having a rectangular plate surface that is longer in the vertical direction than the front-rear direction of the side surface inclined portion 86. In the vent cap 4, the side surface inclined portion 86 has the wall surface side closing portion 91, so that the rear end of the side surface opening portion 87 is located forward by the length of the wall surface side closing portion 91 in the Y direction. Then, in the vent cap 4 exemplified in FIG. 13 and the like, the three side openings 87 correspond to the side openings 87 which are shorter by the length of the wall surface side closing portion 91 in the Y direction than the side opening 67. A crosspiece 88 and three rectifying blade pieces 89 are formed.

In the vent cap 4 illustrated in FIG. 13 and the like, the side surface inclined portion 86 is inclined by 27 ° with respect to the Y direction. Further, in the vent cap 4 exemplified in FIG. 13 and the like, the crosspiece 88 has a length of 6 mm in the front-rear direction. In the vent cap 4 illustrated in FIG. 13 and the like, the rectifying blade piece 89 has a length of 15 mm in the front-rear direction and an inclination angle of 35 ° with respect to the axial direction of the insertion tube 12. In the vent cap 3 shown in FIG. 13 and the like, the upper closed portion 64 has a length of 17.1% of the cover 60 when the inner diameter of the ventilation port is 150 mm in the Z direction, and the inner diameter of the ventilation port is 100 mm. In the case of, it has a length of 22.5% of the cover 60. As described above, when the inner diameter of the ventilation port is small, the ratio of the length of the upper closing portion 64 to the cover 60 may be large in the Z direction.

The wall surface side closing portion 91 is a region in the side surface portion 82 of the cover 80 where no airflow is blown out. Therefore, the wall surface side closing portion 91 can keep the position where the airflow blows out from the side surface portion 82 of the cover 80 away from the wall surface W by at least the length in the Y direction of the wall surface side closing portion 91. As described above, since the side surface portion 82 has the wall surface side closing portion 91 that closes the side surface portion 82 on the side of the wall surface W of the building, the wall surface side closing portion 91 suppresses the air flow from being blown out from the vicinity of the wall surface W. be able to.

The wall surface side closing portion 91 has a length of, for example, 5 mm or more and 30 mm or less toward the front in the Y direction from the end of the side surface inclined portion 86 on the side of the wall surface W, so that the airflow is blown out from the vicinity of the wall surface W. Can be suppressed. Further, the wall surface side closing portion 91 is, for example, toward the front in the Y direction from the end of the side surface inclined portion 86 on the wall surface W side from the viewpoint of miniaturization (thinning in the Y direction) of the vent cap 4 and ventilation performance. It is more preferable to have a length of 15 mm or more and 20 mm or less. In the vent cap 4 exemplified in FIG. 13 and the like, the wall surface side closing portion 91 has a length of 17.5 mm.

In the vent cap 4, the side opening 87 is located on a forward extension of the insertion tube 12 in the Y direction, as shown in FIGS. 14 and 15. That is, the vent cap 4 is configured such that the airflow traveling straight from the vicinity of the left and right ends in the X direction of the insertion cylinder 12 toward the front in the Y direction can reach the side opening 87. Here, a comparison is made between a vent cap 4 having the same shape of the side surface portion 82 and one in which the side surface opening 87 is located on an extension line to the front of the insertion tube 12 and one in which the side surface portion 82 is not located (see, for example, FIG. 10). I do.

At this time, if the side opening 87 is located on the extension line to the front of the insertion cylinder 12, there is a difference due to this positional relationship, especially in the direction orthogonal to the axial direction of the insertion cylinder 12 as compared with the other ones. The distance between the insertion cylinder 12 and the side opening 87 can be shortened. Therefore, the amount of airflow blown out from the side opening 87 on the side of the wall surface W (rear) on the upstream side of the airflow can be increased, and as a result, on the front side of the side opening 87 on the downstream side of the airflow. It is possible to suppress the retention of airflow. Therefore, the ventilation performance of the vent cap 4 can be further improved.

Further, the vent cap 4 has a configuration in which the front surface portion 81 has an inclined surface 90 for receiving the airflow from the insertion cylinder 12 to the side opening portion 87, and the side surface opening portion 87 extends forward of the insertion cylinder 12 in the Y direction. It is preferable to have a configuration located on the line. In the vent cap 4 having such a configuration, the airflow blown out from the side opening 87 near the front surface 81 can be made more forward. Therefore, the ventilation performance of the vent cap 4 can be further improved, and at the same time, the airflow blown out from the side opening 87 can be made more forward.

In the "vent cap" disclosed in this application, the configurations shown in each embodiment can be freely combined within a range that does not cause a contradiction. For example, at least one of the bell mouth 51 and the upper obstruction portion 64 in the third embodiment may be combined with the configuration of the first embodiment or the configuration of the second embodiment. For example, at least one of the inclined surface 90 and the wall surface side closing portion 91 in the fourth embodiment may be combined with the configuration of the first embodiment, the configuration of the second embodiment, or the configuration of the third embodiment. For example, the positional relationship between the insertion cylinder 12 and the side surface inclined portion 86 in the fourth embodiment may be combined with the configuration of the first embodiment, the configuration of the second embodiment, or the configuration of the third embodiment.

Although each embodiment of the present invention has been described in detail as described above, those skilled in the art can easily understand that many modifications that do not substantially deviate from the new matters and effects of the present invention are possible. You can do it. Therefore, all such modifications are included in the scope of the present invention.

1 Vent cap (first embodiment)
2 Vent cap (second embodiment)
3 Vent cap (third embodiment)
4 Vent cap (4th embodiment)
10 base (1st embodiment, 2nd embodiment)
11 Back plate 12 Insertion cylinder 20 Cover (1st embodiment)
21 Front part 22 Side part 23 Top part 24 Bottom part 25 Side base part 26 Side slope part 27 Side opening 28 Cross 29 Rectifying blade piece 40 Cover (second embodiment)
41 Front part 43 Front ventilation part for rectification 50 Base (3rd embodiment, 4th embodiment)
51 Bellmouth 52 Flange portion 60 Cover (3rd embodiment)
61 Front part 62 Side part 63 Front ventilation part for rectification 64 Top closure part 66 Side slope part 67 Side opening 68 Cross 69 Rectification wing piece 80 Cover (4th embodiment)
81 Front part 82 Side part 86 Side inclined part 87 Side opening 88 Rail 89 Rectifying blade piece 90 Inclined surface 91 Wall side obstruction W Wall

Claims (9)

A base with a plug that plugs into a ventilation port formed on the wall of the building,
In a vent cap with a cover to be assembled to the base
The cover is
The front part that covers the front of the insertion tube and
A side surface portion between the base and the front surface portion,
The top surface that covers the top of the cover and
It has a bottom surface portion that covers the lower portion of the cover, and has a bottom surface portion.
The side surface portion
It has a side surface inclined portion that is inclined from the side of the base toward the side of the front surface portion in a direction approaching the axis of the insertion cylinder.
The side surface inclined portion is formed with a side surface opening for blowing out the airflow from the insertion cylinder.
The side surface opening is provided with a plurality of crosspieces extending in the vertical direction and arranged at intervals along the side surface inclined portion.
The plurality of crosspieces each have a rectifying blade piece extending toward the inside of the insertion cylinder.
Each of the plurality of rectifying blade pieces has an inclination angle of 45 ° or less with respect to the axial direction of the insertion cylinder, and the airflow blown from the insertion cylinder to the cover is directed to the front side of the front surface portion. A vent cap characterized by being rectified so as to blow out. The front surface portion is provided with a rectifying front ventilation portion that blows the air flow in front of the front surface portion.
The rectifying front ventilation portion is claimed to induce the airflow blown from a region adjacent to the side surface opening to attract the airflow blown from the side opening and blow out to the front side of the front side opening. The vent cap according to 1. The vent cap according to claim 2, wherein the rectifying front ventilation portion is provided at a position less than 30% from the left and right ends of the front portion with respect to the total width of the front portion in the left-right direction.
The vent cap according to any one of claims 1 to 3, wherein the front surface portion has an inclined surface for receiving the air flow from the insertion tube to the side surface opening. The vent cap according to claim 4, wherein the inclined surface has an inclination angle of 15 ° or less with respect to an orthogonal direction in the axial direction of the insertion cylinder. The vent cap according to any one of claims 1 to 5, wherein the side surface opening is formed in contact with an end of the side surface inclined portion on the side surface of the wall surface. The vent cap according to any one of claims 1 to 6, wherein the side surface portion has a wall surface side closing portion that closes the side surface portion on the side surface of the wall surface. The side surface portion has an upper closing portion that closes the upper portion of the side surface portion.
The vent cap according to any one of claims 1 to 7, wherein the base has a bell mouth whose opening area gradually increases toward the front. The vent cap according to any one of claims 1 to 8, wherein the side opening is located on an extension line to the front of the insertion tube.

Images